Union for pipe or tree with metal and resilient seals

Details Union for pipe or tree with metal and resilient seals Union for pipe or tree with metal and resilient seals

1989-04-10

1990-04-24

Callaghan, Thomas F.

Pipe joints or couplings

With assembly means or feature

Particular tool-engaging means or with tool

2853342, 285351, 285354, 285901, 285917, F16L 1902

Patent

active

049194569

ABSTRACT:
Disclosed is a pipe union having a reliable metal ring seal and a resilient seal. The resilient seal is on the pin portion of the union, which has an internal seal surface. The box portion of the union has a bore to sealingly receive the resilient seal and an internal seal surface. The metal ring seal is compressed into sealing engagement with the pin portion and box portion sealing surfaces when the union pin portion and union box portion are connected together by a threaded collar. When the union is utilized in a tree cap for an underwater wellhead and the union box portion is attached to the wellhead, the resilient seal serves as a secondary seal and protects the metal seal. Well servicing risers or lubricators may be connected to the tree cap box portion.

REFERENCES:
patent: 2305668 (1942-12-01), Bruno
patent: 2340732 (1944-02-01), Bruno
patent: 3113792 (1963-12-01), Brown
patent: 3116944 (1964-01-01), Parker
patent: 3288498 (1966-11-01), Billeter
patent: 4209193 (1980-06-01), Ahlstone
patent: 4403795 (1983-09-01), Davlin
patent: 4575044 (1986-03-01), Gentry
patent: 4659116 (1987-04-01), Cameron
patent: 4801160 (1989-01-01), Barrington
Composite Catalog of Oil Field Equipment and Services, 1988-1989, vol. 3, 4 pages.
Composite Catalog of Oil Field Equipment and Services, 1982-1983, vol. 3, 4 pages.
Composite Catalog of Oil Field Equipment and Services, 1988-1989, vol. 2, 4 pages.

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